OK, I throw a lot of different stuff, but only a few of them work.
4-Seam Fastabll - Around 70 MPH, not much more.
2-Seam Fastball - Also around 70 MPH, but good movement.
Cutter - Again, around 70 MPH, not much movement, but some.
Curve - Crappy and un-accurate.
Change - Not bad, get's people swinging, but very little movement.
Knuckle - Excellent. Practically no spin and a good velocity around 45.
Half-Pitch - i was taught this pitch when I was 12 and it has been my best ever since. Your throw it like a fastball, but is held very oddly. You hold it with your thumb and index finger wrapped around it and your miuddle finger on the seam. It has wicked slider-like movement, but is thrown as hard as a fastball. It breaks in a 10-6 fashion and no one can hit it. Heres a picture of how it is held: